prepare_climate_data: Preprocess Climate Data
In climstats: R functions for working with station and gridded climate data.

Description Usage Arguments Details Author(s) See Also

Assigns zname and zvalues and manages raster projection.

1 2	prepare_climate_data(raster_files, raster_source, zname, zvalue, proj)

`raster_files`	needs to be a properly formatted search string (?regex) to be used with dir(). You can test this by using this command: input_files=dir(dirname(raster_files), pattern=basename(raster_files),full.names=TRUE)
`raster_source`	the source of the climate/affiliated data. Currently supports: "prism_dem" (PRISM digital elevation model ftp://prism.oregonstate.edu//pub/prism/us/grids/ \cr us_25m_dem.asc.gz) "prism_4km" (PRISM 4km gridded climate products) precipitation (ftp://prism.oregonstate.edu// \cr pub/prism/us/grids/ppt/) minimum temperature (ftp://prism.oregonstate.edu// \cr pub/prism/us/grids/tmin/) maximum temperature (ftp://prism.oregonstate.edu// \cr pub/prism/us/grids/tmax/) dewpoint temperature (ftp://prism.oregonstate.edu// \cr pub/prism/us/grids/tdmean/) standardized precipitation index (ftp://prism.oregonstate.edu// \cr pub/prism/us/grids/spi/, untested) "narr" (North American Regional Reanalysis NetCDF files http://www.esrl.noaa.gov/psd/data/gridded/ \cr data.narr.html) "generic": function attempts to figure it out. This will, in all likelihood, fail. If using generic, you should probably assign the zname,zvalue, and proj.
`zname`	a string used by raster to denote the properties of the z-profile. This can be anything, but there are some special znames that will be used by other functions: "Date/time" (the z-values represent time series) and "months" (the z-values represent months, so there should only be 12 files, in order).
`zvalue`	if zname="Date/time", zvalue must be a character vector equal to the length of the number of raster_files found, which is coercable to a date via as.Date() using its defaults, " if zname="months", zvalue should be the character vector of the integer months of the input files. If no zvalue is given, zvalue will be a vector of 1 to 12.
`proj`	the projection string in PROJ4 format Refer to http://trac.osgeo.org/proj/wiki/GenParms and http://www.remotesensing.org/geotiff/proj_list/ Example for lon/lat data: proj="+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs"